Journals:

ACS Publications

Journal of American Chemical Society

Journal of Organic Chemistry

Angewandte Chemie

Organic Preparations and Procedures International (OPPI)

Progress in Heterocyclic Chemistry

Informative:

CRC Handbook Online

Web of Science

Spectral Database for Organic Compounds

Not Voodoo  by Alison Frontier

Organic Chemistry Portal

Organic Links

Data Tables (from MSU)

PhD Comics

Chemical Suppliers:

Acros

Fisher Scientific

Sigma-Aldrich